Annual report pursuant to Section 13 and 15(d)

Debt, Net (Debt Schedule) (Details)

v3.20.4
Debt, Net (Debt Schedule) (Details)
12 Months Ended
Oct. 10, 2018
extension
Dec. 31, 2020
USD ($)
Sep. 17, 2020
USD ($)
Dec. 31, 2019
USD ($)
Debt        
Carrying Value   $ 2,086,918,000   $ 1,831,139,000
Revolving Credit Facility        
Debt        
Carrying Value   $ 143,000,000   177,000,000
Weighted average interest rate   1.20%    
Term Loan Facility        
Debt        
Interest rate   1.15%    
Carrying Value   $ 398,447,000   248,706,000
Unsecured note payable        
Debt        
Interest rate   0.00%    
Carrying Value   $ 900,000   1,038,000
Unamortized discount included in carrying value   $ 161,000   223,000
London Interbank Offered Rate (LIBOR) | Revolving Credit Facility | Minimum        
Debt        
Variable rate, spread   0.775%    
London Interbank Offered Rate (LIBOR) | Revolving Credit Facility | Maximum        
Debt        
Variable rate, spread   1.45%    
London Interbank Offered Rate (LIBOR) | Term Loan Facility | Minimum        
Debt        
Variable rate, spread   1.00%    
London Interbank Offered Rate (LIBOR) | Term Loan Facility | Maximum        
Debt        
Variable rate, spread   1.65%    
Mortgage and other secured debt        
Debt        
Carrying Value   $ 255,110,000   211,485,000
Mortgage and other secured debt | Fixed rate mortgage debt        
Debt        
Carrying Value   139,991,000   143,430,000
Unamortized premium included in carrying value   $ 155,000   217,000
Weighted average interest rate   4.16%    
Mortgage and other secured debt | Fixed rate mortgage debt | Minimum        
Debt        
Interest rate   3.82%    
Mortgage and other secured debt | Fixed rate mortgage debt | Maximum        
Debt        
Interest rate   4.62%    
Mortgage and other secured debt | Variable rate secured loans        
Debt        
Carrying Value   $ 115,119,000   68,055,000
Weighted average interest rate   2.28%    
Mortgage and other secured debt | London Interbank Offered Rate (LIBOR) | Variable rate secured loans | Minimum        
Debt        
Variable rate, spread   1.45%    
Mortgage and other secured debt | London Interbank Offered Rate (LIBOR) | Variable rate secured loans | Maximum        
Debt        
Variable rate, spread   2.35%    
Mortgage and other secured debt | London Interbank Offered Rate (LIBOR) | Construction Loan Payable        
Debt        
Remaining borrowing capacity   $ 29,100,000    
Senior Notes | 3.60%, $350,000 aggregate principal        
Debt        
Interest rate   3.60%    
Debt instrument, face amount   $ 350,000,000    
Carrying Value   348,888,000   348,431,000
Unamortized discount included in carrying value   $ 781,000   1,100,000
Effective interest rate on debt   3.70%    
Senior Notes | 5.25%, $250,000 aggregate principal        
Debt        
Interest rate   5.25%    
Debt instrument, face amount   $ 250,000,000    
Carrying Value   248,194,000   247,652,000
Unamortized discount included in carrying value   $ 1,600,000   2,100,000
Effective interest rate on debt   5.49%    
Senior Notes | 5.00%, $300,000 aggregate principal        
Debt        
Interest rate   5.00%    
Debt instrument, face amount   $ 300,000,000    
Carrying Value   297,915,000   297,503,000
Unamortized discount included in carrying value   $ 1,800,000   2,100,000
Effective interest rate on debt   5.15%    
Senior Notes | 2.25%, $400,000 aggregate principal        
Debt        
Interest rate   2.25%    
Debt instrument, face amount   $ 400,000,000 $ 400,000,000.0  
Carrying Value   394,464,000   $ 0
Unamortized discount included in carrying value   $ 4,500,000    
Effective interest rate on debt   2.48%    
Senior Notes | 3.70%, $300,000 aggregate principal        
Debt        
Interest rate       3.70%
Debt instrument, face amount       $ 300,000,000
Carrying Value   $ 0   299,324,000
Unamortized discount included in carrying value       $ 534,000
Effective interest rate on debt       3.85%
Loans Payable        
Debt        
Net deferred financing costs   $ 5,900,000   $ 5,800,000
Line of Credit | Revolving Credit Facility        
Debt        
Number of extensions | extension 2      
Extension option period 6 months 6 months    
Line of credit facility, extension fee 0.075%      
Line of Credit | London Interbank Offered Rate (LIBOR) | Minimum | Revolving Credit Facility        
Debt        
Variable rate, spread 0.775%      
Line of Credit | London Interbank Offered Rate (LIBOR) | Maximum | Revolving Credit Facility        
Debt        
Variable rate, spread 1.45%